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Hot and cold shock testing machine
Structure of cold and hot shock testing machine: perfect model upgrade, simple operation panel interface. Adopt Japanese made imported color touch LCD Chinese / English microcomputer temperature controller. Vertical three box structure, automatic control of circulation process of high and low temperature box, adjustable residence and conversion time, stainless steel tank, multi form record, and multiple safety protection measures and devices. ...
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In order to improve the durability of our products, we can not only improve the durability of our products, but also greatly improve the service life of our customers The interests of the warehouse users are maximized, and the losses are greatly reduced. ...
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Mechanical refrigeration principle of high and low temperature cold and heat shock test chamber: ; refrigeration methods are divided into vapor compression refrigeration, absorption refrigeration, steam jet refrigeration, gas expansion refrigeration and thermoelectric refrigeration. Among the above refrigeration methods, vapor compression refrigeration is the most economical and widely used refrigeration method, and it is also the most commonly used refrigeration method in environmental test equipment. Its principle is to use the latent heat of evaporation of liquids such as freon to absorb heat from the object to be cooled. ...
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the system can adjust the temperature of the air-liquid system to a low temperature without heat shock. ...
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Using the latest fuzzy algorithm and the latest technology control, it can automatically adjust the cold coal flow, effectively take away the heating load of the tested object, so as to achieve the best effect. 2. Power saving mode: microcomputer servo control refrigerant flow, effectively reduce the mutual consumption of cooling and heating, and save more than 20% of electricity compared with the same period. The intelligent automatic conversion expansion system is adopted to automatically adjust the refrigerant flow rate according to the load + the intelligent electric heating power data value (%) to match the automatic analog output power data output value of temperature rise (load). This design can save more than 30% power than the traditional design. ...
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In order to ensure the operation of the cold box, it is necessary to carry out the test at high temperature
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The refrigeration system of the domestic two compartment cold and hot shock testing machine in photoelectric material factory: the original imported compressor from Europe and America is used in the cold and hot shock test box, which has reliable quality and stable performance, R23 environmental protection refrigerant, pollution-free. Three box cold and hot shock box refrigeration system, electronic control system, a number of safety protection mechanisms
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Application of non standard LED high and low temperature cycle test box for electronic components: high and low temperature impact testing machine is suitable for electronics, auto parts, plastics and other industries to test the repeated impact ability of various materials to high and low temperature. Test the chemical changes or physical damage caused by thermal expansion and cold contraction to ensure the quality of products. It is used to test the endurance of material structure or composite material under continuous environment of extremely high temperature and extremely low temperature in an instant, so as to test the chemical change or physical damage caused by thermal expansion and cold contraction in the shortest time. ...
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The refrigeration system of circuit board durable temperature shock testing machine: 1. The cold and hot shock test box adopts the original imported compressor from Europe and America, with reliable quality and stable performance. Modular binary refrigeration system, high efficiency, easy installation and maintenance. 3. Water immersion leak detection method is adopted to thoroughly check the leakage and eliminate potential leakage problems. DuPont R404A and R23 are used as environmental protection refrigerants with no pollution. 5. The refrigeration system of box type cold and hot shock test chamber and the electric control system have many safety protection mechanisms. ...
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The only three box cold and hot impact machine for electronic components: applicable scope: the only three box cold and hot impact machine for electronic components is used to test the material structure or composite material's tolerance under the continuous environment of extremely high temperature and extremely low temperature in an instant, so as to test the chemical change or physical damage caused by thermal expansion and contraction in the shortest time, and confirm the product quality 。 The applicable objects include electronic and electrical components, automation parts, communication components, automobile parts, metal, chemical materials, plastics and other industries, as well as the physical changes of national defense industry, aerospace industry, military industry, BGA, PCB base plate, electronic chip IC, semiconductor ceramics and polymer materials, which can be used as the basis or reference for product improvement. Zhenghang company produces a variety of thermal shock boxes to meet the test requirements of different industries. ...
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The equipment is divided into three parts: high temperature area, low temperature area and test area. It adopts the unique heat cut-off and heat storage and cold storage effect. It adopts the cold and hot air circuit switching mode to lead into the test object for cold and hot impact test. The cold and hot shock test chamber is a necessary test equipment for metal, plastic, rubber, electronic and other material industries. It is used to test the material structure or composite material's tolerance under the continuous environment of extremely high temperature and extremely low temperature in an instant, so as to detect the chemical change or physical damage caused by thermal expansion and cold contraction of the test sample in the shortest time. ...
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Strong safety protection system of lithium iron phosphate cold and hot shock testing machine, the first layer: internal temperature limit of controller, high and low temperature protection setting. The second layer: electronic high temperature and over temperature protection device on the panel. The third layer: extreme over temperature protection against dry burning, ultra-high temperature limit protection device. Leakage protection. ???凿凿凿凿凿凿凿凿凿. ...
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The so-called quantitative failure rate requirement is the requirement for the failure rate level of components determined by the reliability prediction method according to the complexity of the equipment, the working conditions and time when the task is performed, and the required reliability of the task. Due to the different complexity, working conditions and mission reliability requirements of each kind of equipment, the failure rate level of components is also different. According to the reliability prediction Manual of electronic equipment recently published in China, appropriate components are selected. Appropriate components can be selected according to the evaluation data manual published by reliability data exchange center and other reliability exchange data. ...
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Hubei factory direct sales - hot and cold shock cabinet - , accidental failure period. The accidental failure period occurs after the early failure period. This period of failure is a useful period. The characteristics of accidental failure period are: the failure rate is low and stable, which is approximately constant, and has little relationship with the change of time. During this period, the working time and reliability of the products are the same, and the products after failure repair are the same as the new ones. The failure in this period is caused by accidental (or random) factors, such as quality defects, material characteristics and environmental factors. It can also be seen that the accumulated stress of components at a certain time exceeds the strength that they can withstand. The accidental failure period is the reliable working time of the product. It is of great significance to study the failure factors and laws of this period and reduce the failure rate as much as possible. ...
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The test results are closely related to the way of applying stress. The methods of applying stress include applying single stress, applying partial comprehensive stress cyclically, or applying comprehensive stress. Even for the same equipment, the test results will be different if the stress method is different. The method of sample extraction is different, and the test results are also different. Because of the different type of MTBF and the aging test equipment, it is also different. Therefore, the test results of samples randomly selected from the warehouse or batch products passing the inspection are not the same as those with special pre aging. ...
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The cooling air evaporator of plastic mould cold and hot impact testing machine is also called air cooler, which is widely used. Air coolers are used in air conditioners, refrigerators, freezers and household refrigerators. It is the refrigerant in the tube directly evaporation to cool the air, so it is also known as the surface evaporator. According to the way of air flow, air cooler can be divided into natural convection type and forced convection type. The natural convection of air is the free flow of air. For example, the row tube evaporator in the cold storage is installed on the four walls of the warehouse. When the refrigerator works, the air close to the evaporator is cooled. When the air temperature drops, its density increases and it sinks naturally. When the density of the hot air nearby decreases, natural convection is formed and the temperature of the cold storage gradually drops Down. At present, it is only used in cold storage, low temperature test box and various household refrigerators. ...
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The refrigerant charge of special direct cold and hot shock test chamber is too much or too little. If the refrigerant is charged too much, it will cause the compressor to compress the wet vapor. In this way, the cooling capacity of the compressor is reduced when the suction pressure is higher than 0.05 MPa. The phenomenon caused by inoculation is that the frost on the low-pressure pipe at the outlet of the evaporator is more than 10 cm, and the half of the evaporator is frosted. When the filling capacity is too small, the whole area of the evaporator is not fully utilized, and the refrigeration capacity is low. At this time, the appearance of the evaporator is only half frosted, and the temperature of the low-pressure return pipe is increased, and the phenomenon of low-pressure end pressure will appear. Troubleshooting: discharge excess refrigerant, or add air to excess. ...
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If the circuit of the three basic working conditions of the microprocessor is abnormal, the microprocessor can not work, which will breed the failure of parts not working and the power indicator light is on or off. Whether the power indicator lights up depends on the power supply or control mode. In addition, the abnormal clock oscillation circuit will produce control function confusion and other faults. The open circuit of the operation key will breed the failure of starting the machine or the failure of some functions, while the bad operation of the key will breed occasional normal and sometimes abnormal faults. ...
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Ningxia isotherm impact test chamber application: Ningxia isotherm impact test box is widely used. It can control the temperature, dry and wet, or provide high temperature or high humidity environment to compare the material changes and strength degradation degree of rubber and plastic before and after testing. It can also simulate the shipping cabinet environment to better detect the fading and shrinkage of rubber and plastic under high temperature and high humidity Dongguan Ningxia isothermal shock test chamber is specially used to test the heat resistance, cold resistance, dry resistance and moisture resistance of various materials. Suitable for electronic, electrical, food, vehicle, metal, chemical, building materials and other factories. ...
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The technical parameters of linear cold and hot shock test chamber, temperature range: - 20 ℃ - 150 ℃, - 40 ℃ - 150 ℃, - 60 ℃ - 150 ℃, - 50 ℃ - 200 ℃, - 20 ～ 10 ℃, 40 ～ 10 ℃, 60 ～ 10 ℃, and ± 1 ℃ Temperature error: no more than ± 2 ℃. Lower limit of precooling temperature: ≤ - 65 ℃ ? ??
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